body{
    margin: 0px;
    padding: 0px;
}
.index{
    margin: 0;
    padding: 0;
    background-color: rgb(244,248,255);
}
.cheng-content{
    width: 96%;
    margin: 50px auto;
    padding: 40px 20px;
    box-sizing: border-box;
    background-color: white;
    text-align: center;
}
.cheng-content p{
    font-size: 20px;
    margin: 10px 0px;
}
.cheng-content h2{
    font-size: 50px;
    margin: 0;
}
.cheng-content span{
    color: rgb(153,204,0);

}
.cheng-content button{
    width: 200px;
    height: 60px;
    color: white;
    background-color: rgb(153,204,0);
    border: none;
    border-radius: 10px;
    font-size: 20px;
    margin: 20px 0px;
    cursor: pointer
}